Replace WARNING about skipped stats with a SELECT

ANALYZE throws a WARNING that extended statistics was not built due to
statistics target being 0 for some of the columns, but that gets thrown
on the datanode and we never forward it to the coordinator.

So explicitly check contents of pg_statistic_ext if the statistic was
built or not.

2 files changed, 39 insertions, 2 deletions

diff --git a/src/test/regress/expected/stats_ext.out b/src/test/regress/expected/stats_ext.out
index 45aa599cc2..2194c5a342 100644
--- a/src/test/regress/expected/stats_ext.out
+++ b/src/test/regress/expected/stats_ext.out
@@ -79,12 +79,37 @@ ALTER TABLE ab1 ALTER a SET STATISTICS 0;
 INSERT INTO ab1 SELECT a, a%23 FROM generate_series(1, 1000) a;
 CREATE STATISTICS ab1_a_b_stats ON a, b FROM ab1;
 ANALYZE ab1;
-WARNING:  statistics object "public.ab1_a_b_stats" could not be computed for relation "public.ab1"
+SELECT
+  (stxndistinct IS NOT NULL) AS ndistinct,
+  (stxdependencies IS NOT NULL) AS dependencies
+FROM pg_statistic_ext WHERE stxname = 'ab1_a_b_stats';
+ ndistinct | dependencies 
+-----------+--------------
+ f         | f
+(1 row)
+
 ALTER TABLE ab1 ALTER a SET STATISTICS -1;
 -- partial analyze doesn't build stats either
 ANALYZE ab1 (a);
-WARNING:  statistics object "public.ab1_a_b_stats" could not be computed for relation "public.ab1"
+SELECT
+  (stxndistinct IS NOT NULL) AS ndistinct,
+  (stxdependencies IS NOT NULL) AS dependencies
+FROM pg_statistic_ext WHERE stxname = 'ab1_a_b_stats';
+ ndistinct | dependencies 
+-----------+--------------
+ f         | f
+(1 row)
+
 ANALYZE ab1;
+SELECT
+  (stxndistinct IS NOT NULL) AS ndistinct,
+  (stxdependencies IS NOT NULL) AS dependencies
+FROM pg_statistic_ext WHERE stxname = 'ab1_a_b_stats';
+ ndistinct | dependencies 
+-----------+--------------
+ t         | t
+(1 row)
+
 DROP TABLE ab1;
 -- Verify supported object types for extended statistics
 CREATE schema tststats;
diff --git a/src/test/regress/sql/stats_ext.sql b/src/test/regress/sql/stats_ext.sql
index 2a02f8e0ac..9e90842d61 100644
--- a/src/test/regress/sql/stats_ext.sql
+++ b/src/test/regress/sql/stats_ext.sql
@@ -49,10 +49,22 @@ ALTER TABLE ab1 ALTER a SET STATISTICS 0;
 INSERT INTO ab1 SELECT a, a%23 FROM generate_series(1, 1000) a;
 CREATE STATISTICS ab1_a_b_stats ON a, b FROM ab1;
 ANALYZE ab1;
+SELECT
+  (stxndistinct IS NOT NULL) AS ndistinct,
+  (stxdependencies IS NOT NULL) AS dependencies
+FROM pg_statistic_ext WHERE stxname = 'ab1_a_b_stats';
 ALTER TABLE ab1 ALTER a SET STATISTICS -1;
 -- partial analyze doesn't build stats either
 ANALYZE ab1 (a);
+SELECT
+  (stxndistinct IS NOT NULL) AS ndistinct,
+  (stxdependencies IS NOT NULL) AS dependencies
+FROM pg_statistic_ext WHERE stxname = 'ab1_a_b_stats';
 ANALYZE ab1;
+SELECT
+  (stxndistinct IS NOT NULL) AS ndistinct,
+  (stxdependencies IS NOT NULL) AS dependencies
+FROM pg_statistic_ext WHERE stxname = 'ab1_a_b_stats';
 DROP TABLE ab1;
 
 -- Verify supported object types for extended statistics